Liquid refrigerating dispenser



Jan. 4, 1938. G. B. MARZOLF I.IQUID REFRIGERATIIG DISPENSER Filed April 22, 1935 5 sheets sheet l Geore B MarzolF Jan. 4,

1938. G. B. MARZOLF 2,104,467

LIQUID REFRIGERATING DISPENSER Filed Apri l 22, 1935 a Sheets-Sheet 2 f 68 56 so D i) 1 55 95 M 91 M 50 55 l 94 l 90 95 2 Y 92 95 49 G. B. MARZOLF LIQUID REFRIGERATING DISPEN SER 7 Jan. 4, 1938.

' s Sheeis-Sheet s Filed April 22, 1955 Ge org'e B. Marzolf Patented Jan. 4, 1938 PATENT OFFICE 2.104,46! LIQUID REFRIGERAIING DISPENSER George B. Marzolf, St. Paul, Minn., assignor to Farwell Ozmuu Kirk & 00., St. Paul, Minn., a corporation o! Minnesota Applcaton April 22, 1935, Serial No. 17,638

10 Claims.

My invention relates to improvements in devcesfof the character disclosed in my copendng applicatio-n for patent for Rfrigerating dpensers for beverages, filed August 24, 1933, under Serial In brcweries, bcer corxtainers in the form o kegs are cleansed, fil1ed and otherwise handled, princpally in conventional machines, according to standard practices, the kegs, at times, being rolled and, at times, grasped by thechines. At the brewery,beer is kegged and kept at. a temperature somewh.t below 45 F., the optimum temperaturefor consumption, and at the same time is kept under a pressure of carbon dioxide gas at app roximately thirty-eight pounds to hold% the beer and keep it from becoming flat. A conditioned keg of beer deiivered for consump-.

tion, in most cases, requires additional refrigeration to maintain the temperature of the beer f, at 45 F. 01 thereabouts and requires the introduction into the keg of a pressure medium, preferably carbcn dioxlde gas, for augmenting the initial pressure as the beer is drawn (expelled) under pressure.

refrigerating the beverage and aiso for producing pressure to dispense the same.

Ancther object of the invention is to provide a device, as above, in which the beverage container may be handled conveniently in the man ner of the ordinary keg in conventional brewery practice.

A further object of the invention is to provide an improved dispensing device of the present character in which beer may be refrigerated and held in proper condition for consumption and from which such beer may be properly dispensed under sutable gaseous pressure.

Other objects of the inyention reside in the 5:) novel ccmbination and arrangement of parts and in the details of construction hereinafter illus trated and/or described. In the drawings, Fig. 1 is a vertical central sectional view of a dspensing apparatus embodying my invention; Fig. 2 is a sectio nal perspec- In drawing beer from a keg with the usual cally and efliciently exnployed as ,a-medium for.

1 provide and like establishments.

tive view in detail of the receiving end of the draft tube, said view being taken as on the line 2--2 of Fig. 1; Fig. 3 is a pian view of the keg or container for the liquid to be dispensed; Fig. 4 is afragmentary sectional view in detail of the 5 upper portion of the keg. saifd view being taken as on the line 4- of Flg. 3; Fig. 5 is a detail sectional view taken as on the line 5-5 of Fig. 4; Fig. 6 is a.lso. a fragmentary sectional view ci the upper portion of the keg, the same being 10 taken as on the line 6-6 of Fig. 3; Fig. 7 is a plan viewof the keg with the coverot the carbon doxide receptacle removed and with certain portions broken away to reveal the construction of the vent leading from said recepta'cle into the 15 interim 013 the keg.

Reference being had to the drawings, it will f be notecl that the structure shown in Fig. 1, in-

cludes a container or keg indicated in its entirety by the referenee character A and further includes a beat insulating case B in which the container is removably received and housed.

'I'he insulating case B, illustrated diagrammatically in Fig. 1; may be of any suitable construction, such, for example as the case illustrated in my copending application, Serial No. 686,544,

wherein, as in the present application, the case includes a body Il) having sides II and a bottom ti ami further includes a cover i3 removably applicatble to said body, said cover having an opening Il therein for a conduit by means of which a container within the case is tappeti. 'I'hs case is preferably, though not necessarly, square in cross-section and is so proportioned internally that it will receive the container A on end and.

a space l5 between the inner wa1l surfaces there0f and the sides and top of the container. y

' 'I'he keg-like container A, constructed ci sheet V metal, includes a cylindrical side wall II? and 40 upper and lower heads H, H inset from the ends of the side wall to provide chines |9, which afford means through which the container may be handled manually and by the conventional keg handling machnery commonly used in .Joreweries 5 The side wall Il is formed. with the usual fllling bung 20 at a point midway between the heads I 1,- 18 and is provided. with hoops 2| at either side of thebung upon which the container may be rolled in the usua1 manner.

A dispensing conduit D, comprising upper ami lower conduit sections d anni ci, conducts liquid under pressure from the bottom 015 the container to a valve or faucet 30, incorprated in mg a gasket 44 for (Fig. 3), formed in 40. At the. lower the upper conduit section d. In the construction of said sectional condult D (Figs. 1 and 4), the lower section consists of a tube 3|, having an enlarged tubular member 32 at its upper end, said. member being formed with an outwardly tuxned flange 32 at the extremity thereof. This conduit section 11. is received in the bore of a boss 33 fitte d in an opening in the head I! of the container and welded to sald head. Said boss 33 is formed with an internal annular shoulder 34 providing a. seat for the flange 32. of the member 32, as best seen in Fig. 4. Dlsposed mainly wlthin the said enlarged tubular member 32 is a coupling 35 through which the two c0ndult sections 11 and d are connected, said coupling baving valve means incorporated therein and adapt.. ed to be actuated by the conduit section d when the same is mam'pulated in connecting it With and dsconnectng it from the lowerconduit section d' Said coupling 35 has a substantially tubular body 35 and a head 36 formed with an external flange 31. Except upon being removed to be cleansed or replaced or repalred, the coupling 35 occupies a postion within the boss 33 and tubular member 32. the coupling 35, the flange 31 bears against a. gasket 38 which in turn bears against the flange 33 of said tubular member 32. An annular looknut 39 threaded externally and fitting internal threads in the boss 33, clamps between il; and the shouldr 34 on said boss the said flanges 33 and 31 and the gasket 38, such construction serving ri gidly to hold the concluit section d? and coupling 35 in place and wlthout leakage at the jolnt between sald condut section d and boss 33. The head 36 of the coupling 35 isformed wi|.r an Internal annular flange 40, providing a showder 4|, a second internal flange 42 on the body 35of the coupling 35-providing ausecond shoulder 43. These shoulders 4| and 43 are.spaced apart and face each other, the latter support- At its lower end, the |;ubular body 35 of the coupling 35 is -formecl with a web or valve seat 45 (Fig. 5), the central portlon of which provides a bea.rlng wherein' a.valve stem 46 is rotatbly the upper face of the web 45, nuts 5| on the lower threaded end of sald stem serving to mainta.in a tight turning. fil; between the valve head 48 and the lower face of the apertured v'veb 45. The valve head48 ispr'ovidd with an anertured tacing disk 52 and with a tubular gaskel; 53 encircllng the stem 46- to render the valve structure pressure tight. d, which consists of a tube or pipe 54, is enlarged at its lower end, an annular shoulder 55 being provlded in such construction. Above this shoulder 55 the sald ehlarged porto n of sa|d condult sectlon d 1s formed with dlametrically opposed ears 56 which are.recelved in slots 51, the internal flange 40 of the conpling member 35, the uppex surfaces of said ears 56 being formed to provide cams for engagement wlth the shoulder 4| of the internal flange extremity of said conduit section d the bore therei n ls enlafged and shaped to provide a socket 58 conforming with the shouldered'head 50 of the valve stem 46. Immediate- In this position of.

.tion 11 and the bung 20 of the The upper condut sectloh' ly above said socket 58 and for the purpose of bringing said bore into communication with the interior of the coupling member 35, said tubular conduit section d is provided with diametrically opposed apertures 60 therein.

In applying the condut d to the coupling member 35, the lower end thereof is inserted into said member, the ears 56 thereon enterlng the slots 51 and the socketed extremity thereof fit ting over the shouldered head 50 of the valve stem 46. The conduit; section d is then turned to the right. In thus turning said section, the upper cam surfaces of the ears 56 coact v vith the shoulder 4| and force the shoulder 55 of sad condult section against the gasket 44. Concurrently therewith, the socketed extremity of said conduit section d turns the valve stem 46, laringing the ports 49 of the valve head 48 into registration Wlth the ports 41 in the valve seat 45 whereupon communcation, under control of the faucet 30, is had with the interlor of the container A through the condult seclions cl and d In detaching the condut sectlon d, it is first turned to the left to bring the ears 56 back into reglstraton with the slots 51. Concurrently, the valve head 48 is turned into position, obstructng'the ports 41 in the valve seat 48 of the coupling member 35. Thus, the valve structure in the coupling member is closed and the conduib sectlon d freed for detachment from the container A.

With the container A disposed within the case B, es shown in Fig. 1, and wlth the cover I 3 of said case in place on the body thereof, the application of the condult section d to the container is elfected by passing the lower end of said conduit section through the opening M in said cover, and then securing said end of said section to the coupling member as previously explained. A stopper 6|, slidably carried by the conduit sectlon d fits into the opening M in the cover I3, sealing said opening and bracing sald sectlon through the cover.

Incorporated within the container structure is a receptacle C for solld carbon dioxide. 'I'his receptacle includes a body of sheet metal consistlng'of a cylindrlcal side wall 62 and bottom 63 and further includes a cover 64. The body of said receptacle C is eccentrically disposed withn the container A. said receptacle, the condult seccontainer being relatively disposed as shown in F'lg. 1. Theupper edge of the cylindrlcal wall 62 C is welded to the head |1 of the container at a marginal portion thereof encircling an opening formed thereln, the salient angle at the junction of sald receptacle between the head |1 and sidewall 62 frming ably a cast disk formed with radlal relnforcing ribs 64 at the under slde thereof and further formed with a, circumferential groove 66 al: its lower margin, sald groove containing an annular gasket 61 adapted to engage the annular seat 65 at the mouth 01 the receptacle body when said cover ls in piace to close said receptacle. 'I'his cover is releasably clarnped in place by means of a yoke-bar 61 fltted with a clamping screw 68 intermediate its ends, said screw havlng a square socket 69 in the upper end thereof to recelv a wrench and having a rounded lower end 10 adapted to be received in a complementary depression or seat 1| centrally formed in the cover 64. Terminal ears 12 on-the clamplng bat61 engage the lower sldes'of overhanglng lugs 13 -fitted te said head and chine.

chine l9, said lugs being secured, as by welding,

Removably applicable to the body of the receptacle C isa square bo'x or receiver E for the solid carboh dioxide to be contained within said receptzicle,said receiver consisting of a shell of sheet metal having sides 14 and a bettm 15 lined with a relatively thick beat insulating linng Iii. When this receiver E is in its place within the body of the receptacle C, the bottcm 15 of the receiver rests upon the bottom3 of the recept'acle, while the upright corners of the receiver stand closely adjacent to the cylindrical wa11.62 of the receptacle. In thus fitting the square receiver E to the cylindricai body 62 of the receptacle, the former is held against sidewise movement in the latter. Yet, contact between the sides ef the receiver and the side wall ef the receptacle is confined te line contact and at most is limited te tour lines at the four comers of the receiver. The depth of the receiver E is such that a space s left between the top thereof and the cever 64 of the receptacle C and this space is in cemmuncatien with the spaces between the sides ci the receive! E and the cylindrical wall 62 Of the receptacle. Thus, it will be understood that the celd carben diexide gas generated from the solid carbon dioxicle riielting in the receiver E will flow over the rim of the receiver into the spaces between the sides ef receiver and receptacle where such gases Wili contact the receptacle wall 62 and also portions of the bottem 63 ef said receptacl. 'In this cennection, it may be notd that the said carbon diexide in the recever is well nsulated against the transference of beat therete by cenductivity through the structure of said receiver.

Twe vents F and G provide for the eseape of gaseous carbon dioxide frein the receptacle C, the vent F leading into the interir ef the centainer A and the vent G leading to the outside of said container i'nto the space between the centainer and the interier of the case B. In previding the vent F, a boss 11 (Fig. 7) is fitted in an opening 18 in the wall 6! et the receptacle C and welded te said wall. This boss has an axial bere 'lil threaded at its inner end and reduced in diameter al: its outer end te form an annular sheulder 80. A rubber valve member 8| ef well known constructicn flts into the bere 19 of said boss'll, said valve member having an annular shoulder 82 for cooperation at one side therof with the shoulder: 80 on the boss II and at the other side thereof with a plug 83 screwed into the threaded end of the boss 11 and formed with an. axial bere 84 therein. Suitabl gaskets 85, 86, occupying pcstions at opposite sides of the shoulder 82 of the valve member 8|, respectively engage the sheulder 80 of the boss 11 and the inner end ef the plug 83. In said vent F, cem- C and the interier ef the centainerA is had threugh the bere 84 of the plu 83, the chamber 81 in the valve member 8|- and the slit 88 insaid member. Said valve member 8|, while readily admtting of the passage' of gaseous carbon dioxide from the receptacle C to the -interier ci the container A, prevents any reverse flow et gas or liquid from the interier 01' the container to the interior of said receptacle C. In providing the vnt G (Fig. 4), a threaded bere 89 is formed in the cever 64 of the receptacle. A fitting 90 fermed with an axial bore 9| is screwed into the bere 89 of the cever 64 from the outside. The outer end ef the bere 89 is internally threaded, the inner 4 clamped in place.

end thereef being reduced te ferm a. valve seat 92. A hall valve 93 resting on said seat 92 ls backedby a Compression spring 94 which, in turn, is backed by a plug 95 screwed into sad threaded end ef said bere, said plug being formed with an the fitting 90 establishes communication between;

the interier 0! the receptacle C and the exterior thereef when the ball valve 93 is unseated. A greater or lesser pressure 01 the carben dioxide gas within the receptacle C unseats said hall valve 93 accerding to the adjustment the plug 95 which increases or diminishes the cempression of sai d spring 94, the adjustment of said plug being determined by the gaseous pressure dsired within the interior of the container. that the pressure of the gaseeus carbcn dioxide within the container should not si1bstantially exceed that which is amply suflicient for the expulsion of the liquid from the container and at the seme time sufficient for "helding the liquid in preper condition. Accordingly, the plug 95 of the veni: G is adjusted so that the ball valve 93 will yield to any pressure in excess of that elected te be maintainecl within the container A.

Gas in the spaces between the receiver E and the inner surfaces ef the body ef the receptacle perfect contrel ef the generation et gas therefrom, the resu lt being'that the proper liquid dispensing pressure is provided Wthin the container A and ampie, but net excessive, refrigeratien aiforded by the gaseous carbon dioxide outside ef said container and also inside thereof at its source.

The container A, With the receptacle cever 64' and receiver E remeved, is handled by the usual equipment and in the same manner as the ordinary bear keg in the cleansing, filling, storing, and transportation tliereof. Preparatory te dispensing the liquid from the container, the receiver E, charged with 'selid carbon dioxide, is placed. in the receptacle C andthe receptacle cever 64 Thereupon the charged centainer is placed within th case B and is tappeti, through the cever ef said case, by the application of the conduit sectien ci to its cempanion sectien d as shown in Fig. 1. The gaseous carben dioxide generated from the melting" seld carben diexide within the receiver C flews over the upper 'edge of the receiver, thence down the sides thereof to the expesed portiens of the bottom of said receiver, thence upwardly along the sides of said. receiver and thence into the space between the top of the receiver and the receiver cever 64. When the gas within the receptacle builds up suflciently te unseat the valve 93 in the vent G, the said gas escapes threugh said veni; into the space between the head I! ef the container A and the cever 64 ei the case B.

ductien through the walls of the receptacle C 7 Which contact the gas within the receptacle and through the Walls of the container which are exteriorly contacted by the gaseous carbon dioxide confined within the case B. When the liquid within the container A is expelled therefrdm through the conduit D by the pressure initially built up therein upon the filling of said container, said pressure is reduced, but upon being reduced to an amount less than that of the gaseous pressure within the receptacle C, it is promptly restored and balanced with such pressure in the receptacle by the passage of gas'eous carbon dioxide from said receptacle, through the vent F, to the interior of the container. replenishing gas to the interim of the container A has a further cooling eiect upon the container contents. -If the supply of solid carbon dioxide within the recever C, becomas exhausted before the. container is emptied, a replenishing supply may be introduced into said receptacle upon removing the cover 13 of the case B and the cover 64 of said receptacle.

It has been found in dispensing' carbonated beverages under gaseous pressure and particularly beer, that the liquid is often initially dis-. charged from the ordinary draft conduit in an excessively wild or foamy condition with the 'result that an appreciable quantity ci the liquid is wasted before it flows from the conduit in suitable condition to be served. This is particularly true when it is attempted to serve the liquid from a containersubjected to disturbances as on a. railway train, boat or other means of transportation or from a container which after having been disturbed hasnot remained quiet long enough to aliow the contents thereof to become settled. In the present construction, i Drovide means for preventing the discharge of the container con;

- tents from the draft Conduit in the above noted objectionable state. This means consists of a thin disk-like end piece 9'! (Fig. 2) applied to the inlet end of the tube 31 of the conduit section d?,

- said end piece having a small central opening 98 therein through which liquid from the container A passes into said tube 3I. In this construction, the lower end of the condit tube has a restricted inlet opening of relatively littie axial length, the same opening abruptly into the relatively large bora of said tube 3L Optimum results have been secured with a draft tube of one-half inch inside diameter having a restricted inlet opening of from one-eighth of an inch to threesixteenths of an inch in diameter. This restricted inlet opening in the draft conduit damps the flow of the liquid. in the conduit, reducing the pressure and minimizing the turbulence of the said liquid therein. The 'result is to provide for the discharge of beer from the conduit in optimum condition-that is to say, in a condition in which" the quantity offoam is in proper proportion relative to the clear liquid and in which such team is of a. fine and firm texture.

Changes in the specific forniof-my invention,

as herein disclosed. may be made within the scope of what is claimed without departing from the splrit of my invention.

Having described my inve'ntion, what I claim as new and desire to protect by Letters Paten't is 1. In a dipenser of the character described, a. closed liquid container, a conduit leading from the interior of the container for dispensing the liquid therefrom, a receptacle including a body incorporated within-the container and opening to the outside through a. wall thereof, a remov- This influx of able cover for the receptacle body, a heat insulated receiver for solid carbon dioxide removably disposed within said receptacle, said receiver having portions thereof closely adjacent to the receptacle body and other portions spaced from said body to expose inner portions thereof to the gas generated from the solid carbon dioxide in said receiver, said receptacle strlicture being vented to release gaseous carbon dioxide into the interior of said container and also to the outside, the venting of the gas to the outside being through a vent in the receptacle cover and under restriction' such that the container is constantly charged with gas at the desired liquid dispensing 'pressure.

' 2. In a dispenser of the character described, a closed liquid container, a conduit leading from the interior of the container for dispensing the receiver for solid carbon dioxide removably disposed within said receptacle and having a side wall portion limited to line contact with the side wall portion of sai-d receptacle, said receptacle body having a vent therein for releasing gaseous carbon dioxide directly into said container, and said receptacle cover having a vent therein for releasing gaseous carbon dioxide to the outside, said second vent having check means oifering controlled resistance to the passage of the gas therethrough, whereby the container is constantly charged through said first vent with the gas under the desired liquid dispensing pressure.

3. In a dispenser of the character described, a closed liquid container of keg-lke form baving a filling bung in the side thereof, a receptacle for solid carbon dioxide'including a body and a removable cover therefor, said body being disiposed within the container and incorporated in the structure of one of its heads in position offset from the center of such head in the direction of said bung, a conduit leading from the interior of the container for conducting liquid therefrom, said conduit p'assing through such head and extending along that portion of the side of the receptacle body oppo site said bung, said receptacle structure having a vent therein for releasing gaseous carbon dioxide into said container and a second vent therein for releas-' ing gaseous carbon dioxide to the outside, said second vent offering resistance to the passage of the gas therethrough, whereby the container is constantly charged directly through said first vent with the gas under the desired liquid dispensing pressure.

4. In a dispenser of the character described, a closed liquid container, a conduit leading from the interior.of the container for dispensing the liquid therefrom, a receptacle including a. body incorporated within the container and opening to the outside through a wallthereof, a removable cover for the receptacle body, a heat insulated feceiver for so1id carbon dioxide removably disposed within said receptacle, said receiver having portions thereof spaced from the receptacle body to expose inner portions of said body to the gas generated from the solid carbon dioxide in said receiver, said receptacle structure whereby the container is constantly charged with being vented to release gaseous carbon dioxide into the interior ci said container and also to the outside, the venting of the gas to the out- -side being controlled, whereby the container is constantiy charged with gas under liquid dispensing pressure.

5. In a dispenser of the character described, a

closed liquid container, a conduit leading from the interior of the container for dispensing the liquid therefrom, a recepta'cle incorporated within the container and including a body consisting f a side wali portion and an end, said member being joined at its edge opposite said end to a wall portion of the container marginally of an opening therein, a removable cover for said receptacle body, a heat insulated receiver. for solid carbon dioxide removably disposed Within said receptacle and having side wall portions at intervals in close proximty to the side wall portion of said receptacle, said receptacle having one vent therein for releasing gaseous carbon di-, oxide directly into said container, and a second vent for releasing gaseous carbon dioxde to the outside, said second vent offering resistance to the passage of the gas therethrough, whereby the container is constantly charged through said first vent with gas under liquid dispensing plessure.

6. In a. dispenser of the character described, a closed liqid container of keg-like form, a receptacle for solid carbon dioxide including a, body and a removable cover therefor, said body being disposed within the container and incorporated in the structure of one of its heads in position offset from the center of such head, a. conduit leading from the interior of the container for conducting liquidi therefrom, said conduit passing thrcugh suchhead and extending a1ong -that portion of the side of the receptacle body farthest removed from the side of the container, said receptacle being vented to release gaseous carbon dioxide into said container and to release gaseous carbon dioxi.de to the outside, the venting 01 the gas to the outside being attended with resistance, whereby the container is constantly charged with gas under liquid dispensing' pressure.

7. In a dispenser of the character described, a closed liquid container of keg-like iorm havim; an inset head, a conduit leading from the interior of the container for dispensing the liquid therefrom, a receptacle tor solid carbon dioxide including a body incorporated within the con-- tainer and consisting of a side wall portion and an end, said side wall portion being joined at its edge opposite said end, to said head of the container marginally of an opening therein, a

V removable cover for said receptacle body, means for releasably clamping said cover in place, said means having a. part secured to the end of the container within the confines of the chine encircling said inset head, said receptacle structtne being vented to release gaseous carbon dioxide into said container and also to the outside, the venting of the gas to the outside being contrdlled,

and case.

therefrom, a teceptacle within the container including a body incorporated in the structure of said upper head and consisting of a. side wal1 portion and a bottom, said side wall portion being joined at its upper edge to said upper head of the container marginally of an opening therein, a removable cover for said receptacle body, a beat insulated receiver for solid carbon dioxide removably disposed within said receptacle and consisting.of a side wall portion and a bottom, said side wall portions 01 said receptacle and receiver being of different outline in horizntal'cross section, bui: at intervals relatively closeiy disposed. said receptacle having one vent tor releasing gaseous carbon dioxide into said container and a second vent forreleasing gaseous carbon dioxide to the outside, said second vent oflering controlled resistance to the passage of the gas therethrough, whereby the container is constantly .charged through said first vent, with the gas gas directly into the basin formed by said head and chine and from which said gas mayoverflow along thesides 01 the container in said space between container and case.

10. In a dispenser of the character described, a heat inaulating case, a closed liquid container of keg-iike 101111 having an u'ppr head and chine, said case receiving the container and providing an enclosed space above and about the sides thereof, a coi1duit tor dispensing liquid from the container, said conduit passing through said upper head of said container and through the top of said case, a receptacle for solid carbon dioxide incorporated withi the container, said receptacle being vented to the interior of the container tor releasing carbon dioxirie gas thereinto and vented to the outside ci the container to release carbon dioxide gas directly into the basin formed by said head and chine and from whicb. said gas may overflow along. the sides of the container in said space between container GEORGE B. MARZOLF. 

